Concept is inspired from the Sphinx in Oedipus Rex, only in my version she has a human counterpart and is a machine, with a bit of an art deco angle. In the original story the Sphinx guards the path to Thebes, asking every traveller a riddle and eating everyone who gets it wrong. Eventually Oedipus comes along and gets it right.

Anyway for those who are curious, here's the riddle:
"What goes on four feet in the morning, two feet at noon, and three feet in the evening?"

I'm very excited about my entry. My first art contest. However, my sketch has taken a turn towards the erotic. (It began as a fat man riding his robot in the park.) Unfortunately, a beautiful woman has taken over the scene. I don't have time to learn how to draw clothes. There aren't any naughty bits explicitly shown, but I think it would qualify as nsfw. Would this be acceptable?